CPU scaling

CPU scaling tool kits can be downloaded from
ftp://partners.redhat.com/a166eabc5cf5df158922f9b06e5e7b21/hwcert/RHEL7/

To setup the packages, follow the sequence below to avoid package dependency issues
dt > lmbench > kernel > stress > hwcert-client >

To run the tests

hwcert-backend run --test=cpuscaling

mkdir /root/cpuscale
mkdir /root/cpuscale/hwcert

cp /usr/share/hwcert/lib/hwcert/*.py /root/cpuscale/hwcert
cp /usr/share/hwcert//tests/cpuscaling/*.py /root/cpuscale/

CPU power state info inquiry
cpupower -c all frequency-info

References
Linux动态频率调节系统CPUFreq之一：概述
/article/1880837.html

Linux动态频率调节系统CPUFreq之二：核心（core）架构与API
/article/1880836.html

Linux动态频率调节系统CPUFreq之三：governor
/article/1880835.html

Linux kernel source code for CPU freq control
drivers/cpufreq/intel_pstate.c

intel_pstate_max_pstate()
intel_pstate_turbo_pstate()
intel_pstate_min_pstate()
intel_pstate_calc_busy()
intel_pstate_sample()

Intel BIOS Implementation Test Suite
http://biosbits.org/

Ways to identify CPUID via windbg
kd> .formats 306a9
Evaluate expression:
Hex: 000306a9
Decimal: 198313
Octal: 00000603251
Binary: 00000000 00000011 00000110 10101001
Chars: ....
Time: Sat Jan 03 15:05:13 1970
Float: low 2.77896e-040 high 0
Double: 9.79796e-319

stepping ID: 1001
model: 1010
family ID: 0110
processor type: 00
extended model ID: 0011
extended family ID: 0000 0000

family 0000 0000 0110, model 0011 1010, stepping 1001
family 6, model 58, stepping 9